The super-hot enterprise software company (formerly known as Box.net) helps employees store and share information, like documents and video files, and access that information from any kind of device -- PC, tablet, or smartphone.

At the start of 2011, Box had 125 employees. When we visited last August, Box was already bursting out of its old space with 240 people. Since then, it's grown to 400, fueled by an $81 million round of funding and sales to big customers like Procter & Gamble (18,000 seats).

This week, Box finally got some breathing room. It moved into a huge and modern new space in Los Altos, just south of Palo Alto.

We paid a visit yesterday morning, and it looks like the kind of place you move when you're done moving -- a true headquarters building with Silicon Valley perks like a keggerator, pool table, and hammocks.

At first, we thought we were in the wrong place. It looks kind of like a hotel...

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But this huge banner set us straight. This building used to house Rambus, a computer memory company. Box took over last year, but it took a while to gut the interior. (If you're wondering, the hotel is around the back.)

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There's the new corporate sign. It's a little hard to see.

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Love the informal greeting: "visitors please knock."

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Here's the lobby. That's a silhouette of CEO Aaron Levie, who's known for wearing bright orange tennis shoes on stage.

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Here's the slide coming down into the lobby.

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It's two-story spiral tube, like something you'd see at a water park. Kind of terrifying, actually. I'll have to try it before i leave.

Because this is the 10x conference room. They have a bunch of pencils and scissors that are 10x normal size there. The name comes from a phrase Box uses to describe its goal for each new release -- it should be 10 times better than the last one.

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A sad little unicorn, yearning to be free. (Actually, this is going to be the swag cage, filled with giveaways. The unicorn is just temporary.)

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Another unicorn by the podium in the cafeteria. The unicorns were inspired by a speech that the founders gave to motivate their employees in the early days. They hadn't prepared very much, so they just got up and started riffing about evil enterprise software snuffing out the life force of the happy little unicorns (employees).

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Another unicorn. This is one of Box's seven core principles: "Believe your epic ideas are possible."

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Here's another one: "Make mom proud (unless she is evil)." Seems like a play on Google's infamous "Don't be evil."

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Box saved one of its old billboards from Highway 101, the main road through Silicon Valley, and put it up in a hallway.

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They call this "the bar," complete with pool table. It's right next to the cafeteria.

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Sure, there's a keggerator.

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Air hockey.

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And an old two-in-one tabletop arcade game -- Galaga and Ms. Pac Man.

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If employees need to rest, there are hammocks and swings upstairs.

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But people actually do work here. Here's the operations department.

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Andy Kiang (product) and Johnny Au (design) are having an impromptu conference in the second floor lounge.

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A view of the engineering team.

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The sales team is hardcore. Here's account executive Eric Lomori with the gong used to ring up big new sales. They also have video screens with up to the minute sales stats and leaders. (They asked us not to take pictures of those.)

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Here's another conference room named after the San Francisco Giants, a Box customer. The room is decorated in Giants colors, orange and black.

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Here's the main boardroom. A meeting was going on, so we couldn't step in, but it's huge.

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This is the SS Enterprise conference room, complete with a cutout of Spock.

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OK, it's time.

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These rules are freaking me out a little. I'm supposed to take of my shoes, cross my ankles, and yell "All Clear" before coming down.

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Terrifying. Yet exhilarating.

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Now, take a trip through another hot enterprise startup that just scored $85 million...